This might be a stretch for this game, but I would love to see EW give us gun models with a range of calibers or gauges to choose from. Right now each model is available in only one caliber or gauge. It would be nice to be able to allow us to customize it to our preferred caliber or gauge. Maybe I want a certain model shotgun in a 28 gauge or a certain rifle in 6.8 Western.
Six options would cover the entire range of mass produced shotgun gauges (10, 12, 16, 20, 28 and .410), and six caliber options would allow more accessibility and customization for rifle hunters. Each new gun could have a few mainstay calibers in three or four standard options (.243, .270, .308/.30-06, 7mm/.300 Mag), allowing two or three more for new calibers (.257 Roberts, .264 Winchester, .280 Winchester, .284 Remington, 6.8 Western, etc.) to be introduced to the game.